#async

How to handle API requests with a chain of MongoDB queries You are writing a backend service for your web app and you need to fetch data from your mongo cluster. The problem is, you do not want your request

비동기로 처리해야 할 상황은 서버에서도 그렇고 프론트에서도 그렇고 상당히 많습니다. 그리고 async과 await가 나왔음에도 불구하고 비동기함수 안에서 다른 함수 스코드를 생성하고 그 스코프 내부에서 비동기로 값을 전달해주기 위해서는 Promise를 사용해야 합니다. function sleep(delay){ return new Promise((res, rej)

자바스크립트는 비동기IO(입출력) 모델을 이용해서 여러개의 이벤트를 처리할 수 있습니다. 비동기IO 모델은 사용자가 이벤트가 발생했을때 기다리게 하지 않고 이벤트가 끝났을 때 알려줄 수 있는 경로만 제공해주는 것입니다. 그래서 이벤트가 발생 후 다른 이벤트를 또 발생시킬 수 있습니다. 내부에서는 여러개의 쓰레드와 프로세스가 병렬적으로 일을 처리하며, 내부에

به‌طوری‌که در پست قبلی نوشتم، تابع بازخوان یا callback تابعی است که به‌عنوان پارامتر به یک تابع ناهمگام (asynchronous) داده می‌شود تا پس از اتمام کار تابع، فراخوانی شود. معمولاً زمانی که کار تابع ناهمگام

یکی از ویژگی‌های زبان جاوا اسکریپت این است که تمام کد برنامه فقط در یک «ریسه» (thread) اجرا می‌شود. این از خصوصیات اصلی زبان جاوا اسکریپت است. با این حال، مرورگر یا محیط میزبان دیگری که جاوا اسکریپت در

Instead of using promises for async tasks, you can do the same thing using the new async and await keywords in JavaScript. Consider this method: main(a) { return Promise.resolve(a) .then(a => asyncTaskA(a))

JavaScript is a single-threaded programming system. However, a lot of tasks are performed asynchronously by the host environment. Async tasks do not follow the ordinary flow of the program, because it

Versión en castellano One of the best features included in the Python 3.X is the asynchronous programming. In 3.4 was added the asyncio module. With the "@asyncio.coroutine" decorator you can

English Version Una de las novedades mas destacadas que ha traído la versión 3.X ha sido la programación asíncrona. A partir de la versión 3.4 se incorporó el módulo asyncio, con el que a través del decorador

Let's Discuss! The point of this post isn't to say one way is better than another way but instead to open up a discussion about what people are using and why. Spoiler alert: I like the Async module from

Here is a simple javascript promise operation that demonstrates the handling of multiple async operations with the Promise.all() method. In the code, I am only showing the resolved results, but you can

Promises are one of the least understood concepts in Javascript. New Javascript developers as well as some experienced ones find the concept of promises difficult. But there are good resources that manage

Neste post explico como utilizar a sintaxe do ES2017 para trabalhar com um "sugar syntax" de Promises conhecidas como funções async/await e exemplifico comparando com Promises para processar

Intro As soon as we start making useful and interesting things with JavaScript we find ourselves using more and more callbacks. Understanding them is an important step in our journey to become a great